package Io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo2 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("humansegment_bk2.jpg");
        FileOutputStream fos = new FileOutputStream("jjj_cp.jpg");

        long start = System.currentTimeMillis();
        byte[]data = new byte[1024*10];
        int len;
        while ((len=fis.read(data))!=-1){
            fos.write(data,0,len);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕！耗时"+(end-start)+"ms");


        /*
        long start = System.currentTimeMillis();
        byte[]data = new byte[3];
        while (fis.read(data)!=-1){
            fos.write(data);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕！耗时"+(end-start)+"ms");
         */
    }
}
